var body = eval("(" + $response.body+ ")");

var name = $persistentStore.read("xx");
//var name = "xxx"

body['result']['name'] = name+String(Math.random());

//下面两行用来测试
var newbodystr = JSON.stringify(body);
//$notification.post("测试替换body","",newbodystr);

$done({body:newbodystr})